Before starting the app, make sure that you have both NodeJS and npm installed.
Move to the app folder and type the following commands to install necessary packages:
npm install react react-dom --save
npm install babel webpack webpack-dev-server -g
npm install babel-loader babel-core babel-preset-es2015 babel-preset-react
Then, type the following to launch the app:
npm install
npm start
The application will start on your local machine, at http://localhost:3333/